We Are The In Crowd - 'Kiss Me Again'
Alex even featured in the video for this one, and it was emotional to say the least. No, you're crying...

The Dangerous Summer - 'Disconnect'
Going back 10 years, Alex appeared on this tour de force from the recently-reunited cult heroes.

Yellowcard - 'Telescope'
Not only is Alex is on this one, but so are Tay Jardine of SAINTE / We Are The In Crowd andCassadee Pope. Check out that harmony around the 3:20 mark.

Amber Pacific - 'When I Found You'
We already knew that Alex is a master of 'whoas', but did you know that his 'la la la la' game is strong too? Apparently Amber Pacific did when they asked him to guest on this...

5 Seconds Of Summer - 'Long Way Home'
It's not the most obvious one on this list, but as well as co-writing this song, Alex also provided some pretty damn flawless backing vocals. Because you can't always own the spotlight.

Lindsey Stirling - 'Time To Fall In Love'
Alex teamed up with the American violinist for this slice of gooey Christmas...ness. Dive in:

Sing It Loud - 'No One Can Touch Us'
A relic that time almost forgot. But Rock Sound doesn't forget.

Alex is on the Rock Sound Podcast this week, talking about the legacy of 'Last Young Renegade' and the direction of their new music. Subscribe to download and listen now at SMARTURL.IT/ROCKSOUNDPOD